The ridiculous 750K was added to inflate the prices of the vehicles on the marketplace by making them more scarce. Gaijin was afraid of too many vehicles costing $5-8, depreciating the value of the entire game.
The requirements for each event with 45,000 per stage are already ridiculous. It’s even worse when you play lower tiers in Arcade. Before you were able to get rid of the vehicle you did not want, but you were still willing to grind the event and get few bucks to buy something you wanted. Now it’s just not worth doing most of the events, if you can just trade your “non-tradeable coupon” for some silly warbonds. On top of that, the almost non-stop events are really burning people out. Gaijin is clearly copying that other game that has multiple events (sometimes even 5) running at the same time. You just have to buy in.
The problem is, no matter how much time you spend in this game over the years, it will never be enough, as there is another event and another BP the next day. You miss a few days and you are screwed, so pull out your wallet comrade. This game has become a never-ending event grinding gulag that sucks out all your free time and even forces you to neglect other things, including your family during Holidays, so you can complete some silly grindy event… and get a non-tradeable coupon.